DeLillo is in the pantheon of great American writers whose books are so thematically enormous that the design of their covers is often fairly generic: see Pynchon's Against the Day, Roth's Everyman, and McCarthy's The Road. This easily could have followed the same path.

Something tells me there's more going on here. It certainly has me wondering: are the towers still there, below the clouds? There's a good deal of tension here, knowing what we know about what happened that day, what's about to happen, or what's happening below and we just can't see it. Or maybe this is the view from the place from which we as people have fallen.

I can't tell if it's intentional or accidental that the dynamic im getting is: rocket shooting up through the clouds, instead of: something falling down. also, it may be the scan/photo, but there's a dark spot in the clouds that visually, due to it's close proximity to where the vertical line ends, implies a hole through which the line disappears. but instead the line ends just beside it. i find this awkward. i would say to the designer: either move it further away so i dont expect what is not happening, or align it so that i get what i expect. overall i'd say beautiful composition and aesthetic, but dubious concept and execution.